Molecular weight dependence of exciton diffusion in poly(3-hexylthiophene)

Mohammad Khairul Zarifi Haji Masri; Arvydas Ruseckas; Evguenia V. Emelianova; Linjun Wang; Ashu K. Bansal; Andrew Matheson; Henrik T. Lemke; Martin M. Nielsen; Ha Nguyen; Olivier Coulembier; Philippe Dubois; David Beljonne; Ifor D. W. Samuel

doi:10.1002/aenm.201300210

Molecular weight dependence of exciton diffusion in poly(3-hexylthiophene)

Mohammad Khairul Zarifi Haji Masri, Arvydas Ruseckas, Evguenia V. Emelianova, Linjun Wang, Ashu K. Bansal, Andrew Matheson, Henrik T. Lemke, Martin M. Nielsen, Ha Nguyen, Olivier Coulembier, Philippe Dubois, David Beljonne, Ifor D. W. Samuel^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A joint experimental and theoretical study of singlet exciton diffusion in spin-coated poly(3-hexylthiophene) (P3HT) films and its dependence on molecular weight is presented. The results show that exciton diffusion is fast along the co-facial pi-pi aggregates of polymer chromophores and about 100 times slower in the lateral direction between aggregates. Exciton hopping between aggregates is found to show a subtle dependence on interchain coupling, aggregate size, and Boltzmann statistics. Additionally, a clear correlation is observed between the effective exciton diffusion coefficient, the degree of aggregation of chromophores, and exciton delocalization along the polymer chain, which suggests that exciton diffusion length can be enhanced by tailored synthesis and processing conditions.

Original language	English
Pages (from-to)	1445-1453
Number of pages	9
Journal	Advanced Energy Materials
Volume	3
Issue number	11
DOIs	https://doi.org/10.1002/aenm.201300210
Publication status	Published - Nov 2013

Keywords

Polythiophene films
Conjugated polymers
Charge-transport
Photogeneration
Transistors
P3HT/PCBM
Blends
Length
Rates

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10.1002/aenm.201300210

Samuel_2016_AEM_Molecular_AcceptedManuscript
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1002/aenm.201300210
Accepted author manuscript, 1.72 MB

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@article{820660e2d38d4dfaacb01ca432a6053e,

title = "Molecular weight dependence of exciton diffusion in poly(3-hexylthiophene)",

abstract = "A joint experimental and theoretical study of singlet exciton diffusion in spin-coated poly(3-hexylthiophene) (P3HT) films and its dependence on molecular weight is presented. The results show that exciton diffusion is fast along the co-facial pi-pi aggregates of polymer chromophores and about 100 times slower in the lateral direction between aggregates. Exciton hopping between aggregates is found to show a subtle dependence on interchain coupling, aggregate size, and Boltzmann statistics. Additionally, a clear correlation is observed between the effective exciton diffusion coefficient, the degree of aggregation of chromophores, and exciton delocalization along the polymer chain, which suggests that exciton diffusion length can be enhanced by tailored synthesis and processing conditions.",

keywords = "Polythiophene films, Conjugated polymers, Charge-transport, Photogeneration, Transistors, P3HT/PCBM, Blends, Length, Rates",

author = "{Haji Masri}, {Mohammad Khairul Zarifi} and Arvydas Ruseckas and Emelianova, {Evguenia V.} and Linjun Wang and Bansal, {Ashu K.} and Andrew Matheson and Lemke, {Henrik T.} and Nielsen, {Martin M.} and Ha Nguyen and Olivier Coulembier and Philippe Dubois and David Beljonne and Samuel, {Ifor D. W.}",

note = "Z.M. is grateful to the Government of Brunei Darussalam for financial support. The research at St Andrews leading to these results has received funding from the Engineering and Physical Sciences Research Council of the UK, and from the European Union Seventh Framework Programme under grant agreement number 321305. ",

year = "2013",

month = nov,

doi = "10.1002/aenm.201300210",

language = "English",

volume = "3",

pages = "1445--1453",

journal = "Advanced Energy Materials",

issn = "1614-6832",

publisher = "Wiley-Blackwell",

number = "11",

}

TY - JOUR

T1 - Molecular weight dependence of exciton diffusion in poly(3-hexylthiophene)

AU - Haji Masri, Mohammad Khairul Zarifi

AU - Ruseckas, Arvydas

AU - Emelianova, Evguenia V.

AU - Wang, Linjun

AU - Bansal, Ashu K.

AU - Matheson, Andrew

AU - Lemke, Henrik T.

AU - Nielsen, Martin M.

AU - Nguyen, Ha

AU - Coulembier, Olivier

AU - Dubois, Philippe

AU - Beljonne, David

AU - Samuel, Ifor D. W.

N1 - Z.M. is grateful to the Government of Brunei Darussalam for financial support. The research at St Andrews leading to these results has received funding from the Engineering and Physical Sciences Research Council of the UK, and from the European Union Seventh Framework Programme under grant agreement number 321305.

PY - 2013/11

Y1 - 2013/11

N2 - A joint experimental and theoretical study of singlet exciton diffusion in spin-coated poly(3-hexylthiophene) (P3HT) films and its dependence on molecular weight is presented. The results show that exciton diffusion is fast along the co-facial pi-pi aggregates of polymer chromophores and about 100 times slower in the lateral direction between aggregates. Exciton hopping between aggregates is found to show a subtle dependence on interchain coupling, aggregate size, and Boltzmann statistics. Additionally, a clear correlation is observed between the effective exciton diffusion coefficient, the degree of aggregation of chromophores, and exciton delocalization along the polymer chain, which suggests that exciton diffusion length can be enhanced by tailored synthesis and processing conditions.

AB - A joint experimental and theoretical study of singlet exciton diffusion in spin-coated poly(3-hexylthiophene) (P3HT) films and its dependence on molecular weight is presented. The results show that exciton diffusion is fast along the co-facial pi-pi aggregates of polymer chromophores and about 100 times slower in the lateral direction between aggregates. Exciton hopping between aggregates is found to show a subtle dependence on interchain coupling, aggregate size, and Boltzmann statistics. Additionally, a clear correlation is observed between the effective exciton diffusion coefficient, the degree of aggregation of chromophores, and exciton delocalization along the polymer chain, which suggests that exciton diffusion length can be enhanced by tailored synthesis and processing conditions.

KW - Polythiophene films

KW - Conjugated polymers

KW - Charge-transport

KW - Photogeneration

KW - Transistors

KW - P3HT/PCBM

KW - Blends

KW - Length

KW - Rates

UR - http://onlinelibrary.wiley.com/wol1/doi/10.1002/aenm.201300210/suppinfo

U2 - 10.1002/aenm.201300210

DO - 10.1002/aenm.201300210

M3 - Article

SN - 1614-6832

VL - 3

SP - 1445

EP - 1453

JO - Advanced Energy Materials

JF - Advanced Energy Materials

IS - 11

ER -

Molecular weight dependence of exciton diffusion in poly(3-hexylthiophene)

Abstract

Keywords

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ERC Advanced Grant EXCITON: EU FP7 ERC Advanced Grant 2012 EXCITON

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Molecular weight dependence of exciton diffusion in poly(3-hexylthiophene)

Abstract

Keywords

Access to Document

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Projects

ERC Advanced Grant EXCITON: EU FP7 ERC Advanced Grant 2012 EXCITON

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